RESTRUCTURING AND OTHER EXPENSE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring expense relating to right of use operating leases	$ 6,701	$ 30,429	$ 12,160
Transaction costs	1,697	2,325	5,180
Restructuring and other expense	17,176	91,073	72,978
CSC Holdings
Restructuring Reserve [Roll Forward]
Restructuring and other expense	17,176	91,073	72,978
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	6,227	50,852	49,321
Facility Realignment and Other Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 2,551	$ 7,467	$ 6,317